John Smith, owner of Fairfield Soda Blasting, on Thursday uses baking soda to remove graffiti from the floorboards of the Johnston Covered Bridge in Madison Township.

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It only took John Smith, of Fairfield Soda Blasting, a few hours Thursday to get rid of several years' worth of graffiti on the Johnston Bridge at Johnston Park.

He was using baking soda to remove it from the bridge's support beams. Smith was using baking soda because he said sand leaves residue in its wake, while baking soda also is a mild abrasive that doesn't severely damage the wood.

"The baking soda works really well on this stuff," he said. "It will take a little of the top layer of wood off, but not like a more abrasive media." ...